Preparation and characterization of magnetic iron oxide nanoparticles loaded over different supports for removal of heavy metal ions from industrial waste water

Abstract

Magnetite nanoparticles (Fe3O4) have been widely studied because it has good characteristic for instance biocompatibility, super paramagnetic properties, non-toxicity, high chemical stability and easy synthesis process. In this work magnetite (Fe3O4) was prepared by co-precipitation method using ferrous and ferric ions and loaded on different supports such as silica (SiO2), with different ratios: 7.5% ,15% , 30% Fe3O4/ SiO2 , active carbon AC, 7.5%, 15%, 30% Fe3O4/AC, oxidized active carbon OAC with ratio: 15% Fe3O4/OAC and magnesium oxide with ratios: 2.5%, 5%, 7.5%, 15% , 30% Fe3O4/MgO. The prepared adsorbents were characterized by X-ray diffraction (XRD) analysis, infrared spectroscopy (IR), transmission electron microscopy (TEM), scanning electron microscope (SEM), surface area measurements (BET), and vibrating sample magnetometer (VSM) techniques. XRD patterns of Fe3O4/SiO2 showed that the broad background peak around 220 is due to poorly crystalline SiO2 and the diffraction peaks (220), (311), (400), (511), and (440) planes occur at 2θ = 30.1°, 36.3°, 43.4°, 57.2°, and 62.3° are corresponding to Fe3O4 , and are quite identical to the phase nanoparticles of Fe3O4 with a face centered cubic structure.